Service Manual
Page 21
... 14V output voltage becomes up to 16V, the zener current cause R819 voltage become up of IC803 is turned off initially, and the CONTROL pin capacitor is used to 0.7V, Q801 is triggered and OVP starts. it inverts AC to DC. 1.2 High Voltage to Low Voltage Control Circuit C805... PWM controller, which composed of primary about 1.35A. R806 and C811 are used to smooth the wave from 90V to smooth the current waves. ViewSonic Corporation Confidential - L801 is charged through R811, R810 and R818. For DC 14V, D803 is reversed. R802 and C802 are for connecting AC Power...
... 14V output voltage becomes up to 16V, the zener current cause R819 voltage become up of IC803 is turned off initially, and the CONTROL pin capacitor is used to 0.7V, Q801 is triggered and OVP starts. it inverts AC to DC. 1.2 High Voltage to Low Voltage Control Circuit C805... PWM controller, which composed of primary about 1.35A. R806 and C811 are used to smooth the wave from 90V to smooth the current waves. ViewSonic Corporation Confidential - L801 is charged through R811, R810 and R818. For DC 14V, D803 is reversed. R802 and C802 are for connecting AC Power...
Service Manual
Page 26
...3 NDRV2 O Bottom MOSFET gate drive output in dual forward converter 4 GNDA Low-current signal ground 5 CT I Timing capacitor of high frequency oscillator 6 LCT I Timing capacitor of set LPWM frequency 7 ADJ I Control command input -DC 8 ENA I Enable input 9 VSEN I Voltage sense ...10 GND 11 VDDP 12 NC 13 NC 14 NC 15 NC 16 NC ViewSonic Corporation I Drain of MOSFET(GND) 5 F I Frequency 6 D I /O Description O B-Link Negative LVDS Differential Data Ground For External Bypass Capacitor Not connected Not connected IN Low : Serial bus; Key Parts Pin Assignment...
...3 NDRV2 O Bottom MOSFET gate drive output in dual forward converter 4 GNDA Low-current signal ground 5 CT I Timing capacitor of high frequency oscillator 6 LCT I Timing capacitor of set LPWM frequency 7 ADJ I Control command input -DC 8 ENA I Enable input 9 VSEN I Voltage sense ...10 GND 11 VDDP 12 NC 13 NC 14 NC 15 NC 16 NC ViewSonic Corporation I Drain of MOSFET(GND) 5 F I Frequency 6 D I /O Description O B-Link Negative LVDS Differential Data Ground For External Bypass Capacitor Not connected Not connected IN Low : Serial bus; Key Parts Pin Assignment...